LiquidCrystal_PCF8574
pcd8544
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| LiquidCrystal_PCF8574 | pcd8544 | |
|---|---|---|
| 4 | 2 | |
| 127 | 90 | |
| - | - | |
| 3.0 | 1.8 | |
| 10 months ago | over 3 years ago | |
| C++ | C++ | |
| BSD 3-clause "New" or "Revised" License | MIT License |
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LiquidCrystal_PCF8574
- D1 Mini problems connecting to 1602 blue display with I2C backpack
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ESP32 connected to a 16x2 LCD Display
There is an I2C lcd adapter (using PCF8574) that drives the LCD using a I2C interface, saving you a bunch of pins. That way you can use local sensors as well, if you want.. Google link - Link to library
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Does anyone know what could possible cause this output? More info in comments
I don't have any bare displays, but some of the I2C backpack displays I have wouldn't work with the stock library. I finally found one here that worked reliably with a range of displays, but that won't solve your problem as it's all I2C and not nibble-mode writes.
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I2C 16x2 LCD display
In addition to the other two comments, I'll add: I've had issues over 25 years with the HD44780 initialization sequence... it can be horribly sensitive to the exact timing. I tried a couple of different libraries for the backpack displays and had the best luck with https://github.com/mathertel/LiquidCrystal_PCF8574
pcd8544
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Can I use this library with an ATtiny85?
All the pins can be changed from the default values you just need to set them when you call the constructor. Look here: https://github.com/carlosefr/pcd8544/blob/6555ce575565724afbf9bc84d341082d2059f99b/PCD8544.h#L65
What are some alternatives?
IRremoteESP8266 - Infrared remote library for ESP8266/ESP32: send and receive infrared signals with multiple protocols. Based on: https://github.com/shirriff/Arduino-IRremote/
Arduino-MQ131-driver - Arduino driver for gas sensor MQ131 (Ozone / O3)
PCF8574_library - PCF8574 library. i2c digital expander for Arduino, Raspberry Pi Pico and rp2040 boards, esp32, SMT32 and ESP8266. Can read write digital values with only 2 wire. Very simple to use and encoder support.
TaskScheduler - Cooperative multitasking for Arduino, ESPx, STM32, nRF and other microcontrollers
LiquidMenu - Menu creation Arduino library for LCDs, wraps LiquidCrystal.
hl-alyx-glove - Firmware and Hardware for a Half-Life: Alyx Gravity Glove Replica
GEM - Good Enough Menu for Arduino
ATtiny84-TinyCalibrator - OSC Calibrator and High-Voltage Fuse Resetter for 8-Pin ATtinys
ArduinoJson - 📟 JSON library for Arduino and embedded C++. Simple and efficient.
TM16xx - Arduino TM16xx library for LED & KEY and LED Matrix modules based on TM1638, TM1637, TM1640 and similar chips. Simply use print() on 7-segment and use Adafruit GFX on matrix.